Hallafi started his career in Sanat Naft Abadan in 2008 and has also played at Pas, Machine Sazi, Saba, Paykan, Rah Ahan, Damash, Pars Jonoubi and Persepolis.
The 28-year-old player joined Al-Hudood on a six-month contract from Naft Al-Wasat of Iraq.
The details of the contract have not been revealed.
Al-Hudood is an Iraqi football team based in Baghdad. In January 2018 the team beat Hamayah Al-Munshat Wal-Shakhsiyat on penalties to win the Iraqi Ministry of Interior Cup.